How do I delete a thread?

Is there any way to actually delete a thread I started?

Are you feeling a little nervous? 😬

Look, within 90 minutes of hitting "post," you can just use the Edit option to wipe your first message clean—and poof, the whole thread vanishes.
Once those 90 minutes are up, though... well, then you’re stuck. You'll have to track down the moderator handling that PDF to get anything done.